Product Count Per Category in Magento

Show_Product_Count_Per_Category.php

<?php

/**
 * @param $category
 * @return int
 */
public function getProductCount($category)
{
    $productTable = Mage::getSingleton('core/resource')->getTableName('catalog/category_product');

    $select = $this->getReadConnection()->select()
        ->from(
            array('main_table' => $productTable),
            array(new Zend_Db_Expr('COUNT(main_table.product_id)'))
        )
        ->where('main_table.category_id = :category_id');

    $bind = array('category_id' => (int)$category->getId());
    $counts = $this->getReadConnection()->fetchOne($select, $bind);

    return intval($counts);
}